Description
ROHM’s Output 1.5A or Less High-efficiency Step-down Switching Regulator with Built-in Power MOSFET BD8312HFN produces step-down output including 1.2, 1.8, 3.3, or 5 V from 4 batteries, batteries such as Li2cell or Li3cell, etc. or a 5V/12V fixed power supply line.
This IC allows easy production of small power supply by a wide range of external constants, and is equipped with an external coil/capacitor downsized by high frequency operation of 1.5 MHz, built-in synchronous rectification SW capable of withstanding 15 V, and flexible phase compensation system on board.

Features
1) Incorporates Pch/Nch synchronous rectification SW capable of withstanding 1.0 A/15V.
2) Incorporates phase compensation device between input and output of Error AMP.
3) Small coils and capacitors to be used by high frequency operation of 1.5MHz
4) Input voltage 3.5 V – 14 V
   Output current 1.2 – 12 V 800mA
5) Incorporates soft-start function.
6) Incorporates timer latch system short protecting function.
7) As small as 2.9mm×3 mm, SON 8-pin package HSON8

APPLICATION
   For portable equipment like DSC/DVC powered by 4 dry batteries or Li2cell and Li3cell, or general consumer-equipment with 5 V/12 V lines